EP2965263A1 - Multimodal segmentation in intravascular images - Google Patents
Multimodal segmentation in intravascular imagesInfo
- Publication number
- EP2965263A1 EP2965263A1 EP14761138.8A EP14761138A EP2965263A1 EP 2965263 A1 EP2965263 A1 EP 2965263A1 EP 14761138 A EP14761138 A EP 14761138A EP 2965263 A1 EP2965263 A1 EP 2965263A1
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- European Patent Office
- Prior art keywords
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- feature
- modality
- data
- ivus
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
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Classifications
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- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/48—Other medical applications
- A61B5/4887—Locating particular structures in or on the body
- A61B5/489—Blood vessels
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- A—HUMAN NECESSITIES
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- A61B5/0033—Features or image-related aspects of imaging apparatus classified in A61B5/00, e.g. for MRI, optical tomography or impedance tomography apparatus; arrangements of imaging apparatus in a room
- A61B5/0035—Features or image-related aspects of imaging apparatus classified in A61B5/00, e.g. for MRI, optical tomography or impedance tomography apparatus; arrangements of imaging apparatus in a room adapted for acquisition of images from more than one imaging mode, e.g. combining MRI and optical tomography
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- A61B5/0037—Performing a preliminary scan, e.g. a prescan for identifying a region of interest
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- A61B5/06—Devices, other than using radiation, for detecting or locating foreign bodies ; determining position of probes within or on the body of the patient
- A61B5/061—Determining position of a probe within the body employing means separate from the probe, e.g. sensing internal probe position employing impedance electrodes on the surface of the body
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- A—HUMAN NECESSITIES
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- A61B2090/364—Correlation of different images or relation of image positions in respect to the body
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Definitions
- the present invention provides methods for detecting features of interest in vascular images based on co-registered sets of data derived from multiple imaging modalities. Unlike conventional imaging techniques that rely on only one imaging modality to detect a feature of interest, the invention uses potentially complimentary information from multiple imaging modalities and combines the extracted information to facilitate detecting a feature of interest. The invention then uses the co-registered set of imaging data for analysis purposes.
- the feature of interest may be a cardiovascular stent, which is difficult to detect using
- the invention also encompasses systems for practicing the above methods. Certain aspects of the invention are particularly amenable for computer implementation, such as the receipt and transformation of information from various imaging modalities, and the alignment of positional data from the multiple modalities into a combined data set. Accordingly, systems of the invention may include computers and processors for executing methods of the invention.
- FIG. 1 shows a system for implementing intravascular image co-registration.
- FIG. 8 illustrates feature-based segmentation from a single image data set according to certain embodiments.
- FIG. 9 illustrates feature-based segmentation from multiple/multimodal image data sets according to certain embodiments.
- the present invention provides methods for detecting features of interest in vascular images based on co-registered sets of data derived from multiple imaging modalities.
- the invention leverages potentially complimentary information from multiple imaging modalities and combines the information extracted from modality to facilitate detecting a desired feature of interest.
- the invention may involve receiving information from a first imaging modality and transforming information from the first modality into a first coordinate space, i.e., positional data or a set of coordinates.
- the invention may also involve receiving information from a second imaging modality and transforming information from the second modality into a second coordinate space.
- the invention may further involve aligning the first coordinate space and the second coordinate space, thereby combining information from the first modality and the second modality into a combined data set.
- the invention then applies information from the combined data set to search for a feature of interest in a selected modality. For example, the information may be used to train a search algorithm for detecting the feature of interest.
- the invention utilizes information derived from co-registered data sets to facilitate detecting features of interest.
- IVUS intravascular ultrasound
- OCT optical coherence tomography
- x-ray angiography x-ray angiography
- CT Computerized Tomography
- MR Magnetic Resonance
- the catheter image processor 26 generates longitudinal cross-sectional images corresponding to slices of a blood vessel taken along the blood vessel's length.
- the IVUS image data rendered by the catheter image processor 26 is initially stored within the processor 26.
- the type of diagnostic imaging data acquired by the diagnostic probe 22 and processed by the catheter image processor 26 varies in accordance with alternative embodiments of the invention.
- the diagnostic probe 22 is equipped with one or more sensors (e.g., Doppler and/or pressure) for providing hemodynamic information (e.g., blood flow velocity and pressure)—also referred to as functional flow measurements.
- hemodynamic information e.g., blood flow velocity and pressure
- functional flow measurements are processed by the catheter image processor 26.
- image is intended to be broadly interpreted to encompass a variety of ways of representing vascular information including blood pressure, blood flow velocity/volume, blood vessel cross-sectional composition, shear stress throughout the blood, shear stress at the blood/blood vessel wall interface, etc.
- the co-registration processor 30 renders a co-registration image from the data previously stored within the first portion 36, second portion 38 and third portion 42 of the image data memory 40.
- a particular IVUS image frame/slice is selected from the second portion 38.
- the co-registration processor 30 identifies fluoroscopic image data within the third portion 42 corresponding to the selected IVUS image data from the second portion 38.
- a pullback device is incorporated that draws the catheter 20 from the patient at a controlled/measured manner.
- Such devices are well known in the art.
- FIG. 4 presents an exemplary co-registration image that results from overlaying or superimposing the radiopaque marker artifact upon the angiogram image.
- the exemplary co- registration display 401 depicts a selected cross-sectional IVUS image 400 of a vessel.
- a radiological image 410 is simultaneously displayed along-side the IVUS image 400 on the display 50.
- the radiological image 410 includes a marker artifact 420, generated from radiological image data rendered by a fluoroscope image frame, superimposed on an angiogram background rendered from the first portion 36 of the memory 40.
- the fluoroscope image frame corresponds to the current location of the diagnostic probe 22 within a vessel under observation.
- the co-registered set of data can then be applied to facilitate detecting a feature of interest in a given modality.
- this may comprise using the co- registered data set to train a search algorithm for detecting the feature of interest in a given modality.
- the feature of interest may be a stent.
- the stent and surrounding vasculature may be imaged with two imaging modalities, such as IVUS and VH-IVUS.
- Two imaging modalities such as IVUS and VH-IVUS.
- a computer system or machines of the invention include one or more processors (e.g., a central processing unit (CPU) a graphics processing unit (GPU) or both), a main memory and a static memory, which communicate with each other via a bus.
- processors e.g., a central processing unit (CPU) a graphics processing unit (GPU) or both
- main memory e.g., RAM
- static memory e.g., RAM
- Systems of the invention may include a computer and a processor as well as computer readable storage medium instructions that when executed, cause the computer to receive information from a first imaging modality and transform the information into a first coordinate space, receive
- System 100 or machines according to the invention may further include, for any of I/O 154 or 171 a video display unit (e.g., a liquid crystal display (LCD) or a cathode ray tube (CRT)).
- Computer systems or machines according to the invention can also include an alphanumeric input device (e.g., a keyboard), a cursor control device (e.g., a mouse), a disk drive unit, a signal generation device (e.g., a speaker), a touchscreen, an accelerometer, a microphone, a cellular radio frequency antenna, and a network interface device, which can be, for example, a network interface card (NIC), Wi-Fi card, or cellular modem.
- NIC network interface card
- Wi-Fi card Wireless Fidelity
- Memory 163, 179, or 129 can include a machine -readable medium on which is stored one or more sets of instructions (e.g., software) embodying any one or more of the methodologies or functions described herein.
- a computer system of the invention includes one or more memory device that is a tangible, non- transitory memory.
- the software may also reside, completely or at least partially, within the main memory and/or within the processor during execution thereof by the computer system, the main memory and the processor also constituting machine-readable media.
- the software may further be transmitted or received over a network via the network interface device.
- FIG. 7 is a flow diagram representing an exemplary method for model development 300 which may be used to search for a feature of interest.
- the method 300 may be implemented using the example computing system environment 100 of FIG. 5 and will be used to explain the operation of the environment 100. However, it should be recognized that the method 300 could be implemented by a system different than the computing system environment 100.
- a co-registered set of positional data regarding a selected feature of interest is obtained from a data storage device, such as the system memory 129, an internal or external database, or other computer storage media.
- transformations such as logarithmic functions to change the distribution of data to meet model requirements (e.g., base 10, natural log, etc.).
- model requirements e.g., base 10, natural log, etc.
- the particular data preparation procedures are dependent upon the model or models that will be trained using the co-registered data set.
- the particular data preparation techniques for various different model types are known, and need not be described further.
Abstract
Description
Claims
Applications Claiming Priority (2)
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US201361774154P | 2013-03-07 | 2013-03-07 | |
PCT/US2014/021659 WO2014138555A1 (en) | 2013-03-07 | 2014-03-07 | Multimodal segmentation in intravascular images |
Publications (3)
Publication Number | Publication Date |
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EP2965263A1 true EP2965263A1 (en) | 2016-01-13 |
EP2965263A4 EP2965263A4 (en) | 2016-10-19 |
EP2965263B1 EP2965263B1 (en) | 2022-07-20 |
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EP14761138.8A Active EP2965263B1 (en) | 2013-03-07 | 2014-03-07 | Multimodal segmentation in intravascular images |
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US (1) | US9770172B2 (en) |
EP (1) | EP2965263B1 (en) |
JP (1) | JP6243453B2 (en) |
CN (2) | CN113705586A (en) |
WO (1) | WO2014138555A1 (en) |
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JP6243453B2 (en) | 2017-12-06 |
EP2965263B1 (en) | 2022-07-20 |
US20140254900A1 (en) | 2014-09-11 |
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JP2016525893A (en) | 2016-09-01 |
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